按照世界卫生组织在国际旅行和健康指南中提出的建议，来往于受到脊髓灰质炎影响的国家的旅客，应当全面受到疫苗接种的保护。
As per recommendations in the WHO's International travel and Health guidelines, travelers to and from polio-affected countries should be fully protected by vaccination.
如果你想要一个典型的无有优势的旅游指南，这里有一些应用程序，让内部旅客占上风。
If you want an advantage over the typical clueless tourist, there are a few apps which give plugged-in travelers an upper hand.
所有旅客均应认真学习房间门后贴的安全指南。
All passengers are requested to carefully study the safety instructions behind their cabin doors.
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